摘要
基于非平衡态热力学理论中局域熵产生和能耗函数的关系,以及能耗函数可以写作不可逆过程中每个广义流与其相应的广义力的乘积之和,构造了河流的广义力和广义流,推导出河流的能耗函数数学表达式.通过对能耗函数做体积分,进而推导出河流的能耗率.从而避开使用众多复杂的非平衡态热力学和高等流体力学公式,过程简便且易于理解.
Based on non-equilibrium thermodynamics,local entropy production is a function of energy dissipation function,and the latter can be written as the sum of the product of the generalized forces and the corresponding gen-eralized flux of an irreversible process.In this way,once the generalized forces and the corresponding generalized flux of river are formed,the formula of energy dissipation function of river can be obtained.Energy dissipation rate of river system is obtained by volume integral for energy dissipation function.In the entire derivation,the use of many complex equations of non-equilibrium thermodynamics and advanced fluid mechanics can be avoided,making it simple and easy to understand.
出处
《天津大学学报(自然科学与工程技术版)》
EI
CSCD
北大核心
2015年第12期1126-1129,共4页
Journal of Tianjin University:Science and Technology
基金
国家自然科学基金创新研究群体科学基金资助项目(51321065)
国家自然科学基金资助项目(50679053)
关键词
河流
非平衡态热力学
广义流
广义力
能耗率
river
non-equilibrium thermodynamics
generalized flux
generalized force
energy dissipation rate